Energy of an electron = energy of photon emitted(?)

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SUMMARY

The energy of the electrons powering a diode does not equal the energy of the photons emitted from the diode. A diode operates by allowing current to flow through it, which involves many electrons, rather than a single electron. The energy of emitted photons is determined by the bandgap energy of the semiconductor material used in the diode, not directly by the energy of individual electrons.

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Is it reasonable to assume that the energy of the electrons used to power a diode, equals the energy of the photons emitted from the diode? If so, why?
 
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A diode is not powered by a single electron, so I don't know what you mean by "the energy of the electron".
 

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